Skeleton Glitch and Hedge Ascent

[Jorigami]

I have 2 problems which are stopping me from completing my world at 100% 

The skeleton in the sandbox, every time I dig it up it would disappear. No matter what I do it disappears and I cannot access the files and such. 

Second, It wont allow me to discover the Hedge Ascent. I've tried peeping it at all angles and looking at it, through it, even starting a new world to see if it was just my world, but still nothing.